| Company | Location | Certifications | License # |
|---|---|---|---|
| Alto Sewer Service Inc. | South Saint Paul, MN | Pumper | L3665 |
| ATB Professional Services, LLC | Northfield, MN | Designer (Advanced)Inspector (Advanced)InstallerPumper | L4429 |
| B's Pumping Service | Farmington, MN | DesignerInspectorInstallerPumper | L4149 |
| Beaver Creek Companies Inc. | Farmington, MN | Inspector | L4339 |
| Benson Septic Service | Welch, MN | DesignerInspectorInstaller | L190 |
| ESI Septic Services, Inc. | Hampton, MN | Pumper | L2994 |
| Jaeckels Contracting Inc | Farmington, MN | Installer | L4061 |
| Klamm Mechanical Contractors Inc | Burnsville, MN | Installer | L2119 |
| Kleist Construction Management LLC | Hastings, MN | Inspector | L4490 |
| Miller Excavating of Hastings LLC | Hastings, MN | Installer | L4013 |
| Minnesota Septic Inspection | Randolph, MN | Inspector | L4289 |
| Mulvihill Excavating Inc | Cannon Falls, MN | DesignerInspectorInstaller | L121 |
| Onsite Solutions Inc. | Burnsville, MN | DesignerInspector | L4419 |
| Otte Excavating Inc | Randolph, MN | InstallerPumper | L2887 |
| Real Log Homes of Cannon Falls | Cannon Falls, MN | Installer | L2477 |
| Sauber Plumbing & Heating Co | Farmington, MN | DesignerInspectorInstaller | L317 |
| Schlomka Services LLC | Hastings, MN | Pumper | L2989 |
| Schlomka's Portable Restrooms & Pressure Washing, LLC | Inver Grove Heights, MN | Pumper | L3302 |
| Weiland Sewer & Water Inc | Hampton, MN | DesignerInstaller | L4312 |
| Zellmer Excavating Services, LLC | Inver Grove Heights, MN | Installer | L2507 |
20 companies in the Minnesota MPCA SSTS licensed business registry are based in Dakota County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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